Knee brace



FIG. 1 is an exterior view of a knee brace showing my new design, illustrating the brace in an open position;

FIG. 2 is an interior view of the design of FIG. 1;

FIG. 3 is a right side view of my design for the knee brace in a closed configuration with securing straps unfolded;

FIG. 4 is a left side view of the knee brace of FIG. 3; and,

FIG. 5 is a right side view of my design with the knee brace and securing straps in a closed and secured configuration. 

The ornamental design for a knee brace, as shown and described. 